Display screen with a timeline graphical user interface



FIG. 1 is a view of a display screen with a timeline graphical user interface, showing our new design.

FIG. 2 is a view of a second embodiment of a display screen with a timeline graphical user interface, showing our new design.

FIG. 3 is a view of a third embodiment of a display screen with a timeline graphical user interface, showing our new design; and,

FIG. 4 is a view of a fourth embodiment of a display screen with a timeline graphical user interface, showing our new design.

The ornamental design being claimed is shown in solid lines in the drawings. The outer broken lines, with large line segments and large spacing, illustrate the display monitor. The small diagonal broken lines contained within the outermost solid rectangular line illustrates environmental features. All broken lines form no part of the claimed design. 

CLAIM The ornamental design for a display screen with a timeline graphical user interface, substantially as shown and described. 